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How to select lines between two marker patterns which may occur multiple times with awk/sed
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@Brendan the instruction //!b reads if the current line is neither one of the lines that match the range, break and therefore print those lines otherwise all other lines are deleted.
– potong
Feb 17 '17 at 1:14
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What is the difference between 'my' and 'our' in Perl?
... used for local variables, whereas our is used for global variables.
More reading over at Variable Scoping in Perl: the basics.
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Convert Python program to C/C++ code? [closed]
.... This typically leads to shorter C++ code that it is actually possible to read and compiles to faster programs.
– Kyss Tao
Mar 30 '12 at 14:19
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HTTPS setup in Amazon EC2
...got it working the other day and have streamlined some steps. If anyone is reading this from the future: github.com/MSCHF/aws-ec2-node-npm-setup
– Stephen Tetreault
Jan 24 '17 at 20:14
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After Installing Java JDK 7 For Mac OS X - mvn -version still shows java version 1.6.0_31
... If you look at your question above, you can see that JAVA_HOME has already been defined and currently points to the old 1.6 JDK. I'm not familiar with how to change environment variables in OSX, but this is what Maven uses by default.
– Nate
Apr 26 '12 at...
Expanding tuples into arguments
...any iterable) and passes them as the positional arguments to the function. Read more about unpacking arguments.
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Capture key press (or keydown) event on DIV element
...alue other than "0". Making it anything above 0 is going to mess up screen readers for visually impaired users (it will skip everything on the page and go straight to any tabindex above 0). tabindex="0" makes it "tabbable." you can have infinite elements with tabindex="0"
– zon...
Check if a row exists, otherwise insert
...pped by a transaction". If the transaction is implemented correctly, the thread safe issue should not be an issue.
– Gregory A Beamer
Sep 27 '11 at 14:37
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Sorting Python list based on the length of the string
...you need to return an integer, not a boolean. So your code should instead read as follows:
xs.sort(lambda x,y: cmp(len(x), len(y)))
Note that cmp is a builtin function such that cmp(x, y) returns -1 if x is less than y, 0 if x is equal to y, and 1 if x is greater than y.
Of course, you can instead...
Dependency injection through constructors or property setters?
...tructor means that you can validate all at once. If you assign things into read-only fields then you have some guarantees about your object's dependencies right from construction time.
It is a real pain adding new dependencies, but at least this way the compiler keeps complaining until it's correct...